[Qemu-devel] virtio disk

[Qemu-devel] virtio disk

[Hans de Bruin]

I am trying to get my qemu vm to boot of 'VIRTIO_BLOCK', but am not very 
successful. I have got two setups:

A two day old qemu tree from git://git.savannah.nongnu.org/qemu
on a jetway board with a non kvm capable via c7 proc (30W),

and an older qemu-kvm (kvm-88-6-g2ebe329 (10.?)) on a AMD proc (130W)

The AMD boots guests with virtio_block, either with the -kernel switch 
or via the bios. The ViaC7 wil not. Nor the bios nor the kernel detect 
the vitio block device.

Somewhere on the internet I found this qemu-kvm option:

  -drive file=vmdisk1,if=virtio,boot=on

This boot=on, isn't in either of the man pages. qemu doesn't accept this 
option. qemu-kvm needs it to let the bios boot from the virtio_block 
device. I also noticed the qemu-kvm bios has a boot menu which can be 
accessed by F12. qemu has not.


How to get my ViaC7 to run guest oses from virtio?

-- 
Hans

Re: [Qemu-devel] virtio disk

[Avi Kivity]

On 08/10/2009 10:58 PM, Hans de Bruin wrote:
> I am trying to get my qemu vm to boot of 'VIRTIO_BLOCK', but am not 
> very successful. I have got two setups:
>
> A two day old qemu tree from git://git.savannah.nongnu.org/qemu
> on a jetway board with a non kvm capable via c7 proc (30W),
>
> and an older qemu-kvm (kvm-88-6-g2ebe329 (10.?)) on a AMD proc (130W)
>
> The AMD boots guests with virtio_block, either with the -kernel switch 
> or via the bios. The ViaC7 wil not. Nor the bios nor the kernel detect 
> the vitio block device.
>
> Somewhere on the internet I found this qemu-kvm option:
>
>  -drive file=vmdisk1,if=virtio,boot=on
>
> This boot=on, isn't in either of the man pages. qemu doesn't accept 
> this option. qemu-kvm needs it to let the bios boot from the 
> virtio_block device. I also noticed the qemu-kvm bios has a boot menu 
> which can be accessed by F12. qemu has not.
>

boot=on is in qemu-kvm.git but not in qemu.git yet.

-- 
error compiling committee.c: too many arguments to function

Re: [Qemu-devel] virtio disk

[Hans de Bruin]

Avi Kivity wrote:
 > On 08/10/2009 10:58 PM, Hans de Bruin wrote:
 >> I am trying to get my qemu vm to boot of 'VIRTIO_BLOCK', but am not
 >> very successful. I have got two setups:
 >>
 >> A two day old qemu tree from git://git.savannah.nongnu.org/qemu
 >> on a jetway board with a non kvm capable via c7 proc (30W),
 >>
 >> and an older qemu-kvm (kvm-88-6-g2ebe329 (10.?)) on a AMD proc (130W)
 >>
 >> The AMD boots guests with virtio_block, either with the -kernel switch
 >> or via the bios. The ViaC7 wil not. Nor the bios nor the kernel detect
 >> the vitio block device.
 >>
 >> Somewhere on the internet I found this qemu-kvm option:
 >>
 >>  -drive file=vmdisk1,if=virtio,boot=on
 >>
 >> This boot=on, isn't in either of the man pages. qemu doesn't accept
 >> this option. qemu-kvm needs it to let the bios boot from the
 >> virtio_block device. I also noticed the qemu-kvm bios has a boot menu
 >> which can be accessed by F12. qemu has not.
 >>
 >
 > boot=on is in qemu-kvm.git but not in qemu.git yet.

That is clear, but with or without boot=on, the qemu tree should provide 
my guest with a blockdevice, which somehow I am missing. For me the 
solution is simple just switch to the kvm tree.

In wat way will this boot=on eventually end up in the man pages? In both 
trees the MAINTAINERS file does not contain a word about documentation.

-- 
Hans

Re: [Qemu-devel] virtio disk

[Hans de Bruin]

Hans de Bruin wrote:
> Avi Kivity wrote:
>  > On 08/10/2009 10:58 PM, Hans de Bruin wrote:
>  >> I am trying to get my qemu vm to boot of 'VIRTIO_BLOCK', but am not
>  >> very successful. I have got two setups:
>  >>
>  >> A two day old qemu tree from git://git.savannah.nongnu.org/qemu
>  >> on a jetway board with a non kvm capable via c7 proc (30W),
>  >>
>  >> and an older qemu-kvm (kvm-88-6-g2ebe329 (10.?)) on a AMD proc (130W)
>  >>
>  >> The AMD boots guests with virtio_block, either with the -kernel switch
>  >> or via the bios. The ViaC7 wil not. Nor the bios nor the kernel detect
>  >> the vitio block device.
>  >>
>  >> Somewhere on the internet I found this qemu-kvm option:
>  >>
>  >>  -drive file=vmdisk1,if=virtio,boot=on
>  >>
>  >> This boot=on, isn't in either of the man pages. qemu doesn't accept
>  >> this option. qemu-kvm needs it to let the bios boot from the
>  >> virtio_block device. I also noticed the qemu-kvm bios has a boot menu
>  >> which can be accessed by F12. qemu has not.
>  >>
>  >
>  > boot=on is in qemu-kvm.git but not in qemu.git yet.
> 
> That is clear, but with or without boot=on, the qemu tree should provide 
> my guest with a blockdevice, which somehow I am missing. For me the 
> solution is simple just switch to the kvm tree.
> 

And loze kqemu, I should be more patient.

-- 
Hans